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Consumer Electronics by S. P. Bali

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WOOFERS

There are two types of low-frequency speaker, the commonly known woofer, and the more recent addition the subwoofer. The latter is used for the reproduction of frequencies below those produced by the woofer, and it is generally purchased as an add-on to an existing system.

The low-frequency speaker provides the bass of any hi-fi system. Its sole purpose is to reproduce the low-frequency notes of the program source. The prime requisite for low-frequency reproduction is a large diaphragm, the larger the better. The smallest diaphragm for any halfway decent woofer is 8 inches; for a subswoofer it is 12 inches. In addition to large size, the diaphragm must be of fairly heavy construction. Light diaphragms just can't hold up under the vibrations ...

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